Installation and maintenance of piping namely lining and relining of pipes.

Machines and machine tools; Motors and engines (except for land vehicles); Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Incubators for eggs

Rubber, gutta-percha, gum, asbestos, and mica; Plastics in extruded form for use in manufacture; Packing, stopping and insulating materials; Flexible pipes not of metal; Chemical compositions for lining pipes to prevent or repair leaks

Machines and machine tools; Motors and engines (except for land vehicles); Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Incubators for eggs

Rubber, gutta-percha, gum, asbestos, and mica; Plastics in extruded form for use in manufacture; Packing, stopping and insulating materials; Flexible pipes not of metal; Chemical compositions for lining pipes to prevent or repair leaks